Manchester United started their Europa League campaign with a 2-0 win after Ajax Amsterdam on Thursday.
The home side's defence failed to clear their defensive area and the ball eventually fell to Young, who cut inside and fired home through the legs of Ajax's goalkeeper Kenneth Vermeer.
Hernandez wrapping up United's victory when he finished off a neat move involving Antonio Valencia and Wayne Rooney in the 85th minute.
In England, Turkish midfielder Mehmet Topal scored a stunning goal to clinch a 1-0 victory for Valencia against Stoke.
The 25-year-old fired the ball into the top corner in the 36th minute to give the visitors the edge ahead of the round-of-32 second leg in Valencia next week.
Manchester City also won away from home, coming from a goal down at half-time to beat Porto 2-1.
Alvaro Pereira's own goal and an 85th-minute tap-in from Sergio Aguero won the match for Roberto Mancini's side, after Porto forward Silvestre Varela finished Hulk's left-wing cross in the 27th minute.
In Rome, Atletico Madrid cruised to an impressive 3-1 win against Lazio, putting them in prime position to progress to the next round.
Two goals from Radamel Falcao and a neat volley from Adrian inspired the Spaniards to a powerful victory, despite Miroslav Klose's opener early on for the home side.
Metalist Kharkiv routing Salzburg 4-0 in Austria. Taison scored Metalist's first goal a minute after kick-off. J. Cristaldo doubled Metalist lead in the 37th minute. J. Cristaldo once again scored for Metalist in the 41st minute. M. Dević sealed Metalist wins in the 90th minute.
Twente overcoming Steaua Bucharest 1-0. Ola John scored for Twente in the 53rd minute.
PSV Eindhoven beating Trabzonspor 2-1. T. Matavž scored for visitors in the 6th minute. O. Toivonen doubled PSV lead five minutes later. O. Adin narrow PSV goal advantage in the 33th minute.
Czech club Viktoria Plzen missed out on a first-leg victory after Schalke's Klaas-Jan Huntelaar scored a 75th-minute equaliser to cancel out Vladimir Darida's first-half volley.
Lokomotiv Moscow fought back to beat Athletic Bilbao 2-1. Muniain scored visitors goal in the 35th minute.
D. Glushakov scored a penalty goal in the 61st minute to equalize the score. F. Caicedo scored the winning goal fot the home side in the 71st minute.
In other first-leg results, Legia Warsaw and Sporting Lisbon played out a 2-2 draw, Hannover beat Brugge 2-1, Wisla Krakow scored a late equaliser in their 1-1 draw with Standard Liege, PAOK drew 0-0 away to Udinese, and AZ Alkmaar held on to win 1-0 at home against Anderlecht.
